The Garmin is a nice unit.
Features to look for with any GPS
-Map capability, being able to buy and load topo maps make a GPS way more usefull.
-Memory, be sure the unit has enough memory to load the ares(s) you will be in a lot.
-PC interface, being able to upload routes and waypoints from a PC makes a GPS way more usefull.
My main problem with Garmins is the antenna, it is directional. You need to keep the GPS horizontal to maintain sat. lock. Magellin's antenna is helical which means you can stick it in your jacket pocket or on a windsheild mount and keep lock. My Legand was basicaly useless in my truck with it's steel cab, I use my Magellian with no problems. The Magellian Explorist similar to the eTrex line if you want to comparision shop.